Front driveshaft - Double cardan joint bad?

[Stocker]

For quite some time now, I have had a noise I can't really describe. It's road-speed related, kind of a soft ratcheting, whirring sound that comes & goes, presumably with each rotation of the front driveshaft (in 2WD, hubs out - normal "relaxed" rotation from front axle drag).

I pulled out the front driveshaft and the noise is gone, so I'm guessing it's the double carden joint, though I can't see anything obviously wrong.

Can the driveshaft be rebuilt (replace the joint), or do I need a new driveshaft? If I need new, can anyone recommend some good sources?

Thanks, guys (& gals!)